Real-time traffic information can efficiently reflect the condition in urban scenarios. However, how to design an efficient real-time sharing mechanism achieve traveling time estimation (TTE) and dynamic path planning still remains a challenging problem. In this paper, we first propose effective based on distributed transportation system with road-side units, which has lower computing complexity less redundancy. Then, considering current information, present method estimate from source...

In this paper, we investigate the data delivery delay from source to destination for VANETs on bi-directional roadways. The topology includes roadways, left-turn lane, straight through right-turn lane with traffic lights deployed at intersections. Due multi-hop feature of and limited range radio transmission, roadways' switch operations will jointly affect delay. By employing queuing theory analyzing operations, propose formulae different scenarios extend analysis a more general scenario. We...

In recent years, the rapid growth of vehicles has imposed a significant burden on urban road resources. To alleviate traffic congestion in intelligent transportation systems (ITS), real-time and accurate flow prediction emerged as an effective approach. However, selecting relevant parameters from information adjusting hyperparameters algorithms to achieve high accuracy is time-consuming process, posing practical challenges dynamically changing conditions. address these challenges, this paper...

Traditional wireless security focuses on preventing unmanned aerial vehicle (UAV) communications from suspicious eavesdropping and/or jamming attacks. However, there is a growing need for governments to keep malicious UAV under legitimate surveillance. This paper first investigates new surveillance paradigm monitoring via UAVs. Due the power consumption limitation, choice of and will reflect performance UAVs communication. Therefore, analyses UAV's models in different cases, then proposes...

The aim of this article is to improve vehicular traffic in terms both travel time and load balance. To achieve goal, we propose an optimization model that minimizes the sum total road network a representation imbalance effects network. This paper presents analytic formulation problem, algorithm, Dynamic Interior Point Method (DIPM), solves through driver rerouting. Unlike user-optimum optimizations, DIPM leads better fairness for drivers works well case congestion. other system-wide...

Vehicular Ad hoc Networks (VANETs) which is a special form of Mobile (MANETs) has promising application prospects in the future. Due to rapid changing topology structure, how find route can guarantee Quality Service (QoS) an important issue VANETs. This paper presents improved Greedy Perimeter Stateless Routing (GPSR) protocol based on our proposed next-hop node selection mechanism. Firstly, we define link reliability two cases take movement direction angle between vehicles into...

Analysis of traffic flow signals plays an important role in prediction and management. As intrinsic property, the singular point a signal labels new nonsteady status. Therefore, detecting is effective approach to determine moment prediction. In this paper, improved wavelet transform proposed detect points real-time signals. The number detected output via heuristic selection multiple scales. Then, weighted similarity measurement historical utilized predict next point. position decides...

Modulating retro-reflector (MRR), originally introduced to support laser communication, relieves most of the weight, power, and pointing requirements ground station. In this paper, a plug-and-play measurement device independent quantum key distribution (MDI-QKD) scheme with MRR is proposed not only eliminate detector side channels allow an untrusted satellite relay between two users, but also simplify set-ups in practical flexible moving scenarios. The architecture compensates for...

Retracted.

Abstract Emergency communication network (ECN) is the important infrastructure to acquire real-time information after disaster, which essential for rescue task. However, existed routing protocols seldom consider uneven distribution of area so that cannot satisfy ECN’s requirement and quality needs improvement. In this paper, we avoided traditional linear propulsion from rim core proposed a novel four-quadrant mobility model (FQMM), makes rescuers arrive most intensity first, can improve...

In this paper, we analyze the data delivery delay at road intersection, which is influenced by switch operation of traffic lights and topology roadways. By employing arrival rate departure analyzing operations, propose formulae for different cases, respectively. We find that adding left-turn lane to relay packets can reduce intersections. At last, using extensive simulations via VANET Mobisim NS-2, compare average end-to-end single roadway with our results in conditions. The reduction proves...

Abstract Coherent detection (homodyne detection/heterodyne detection) and single photon are commonly applied in classical communication quantum communication/receiver respectively. In this paper, we firstly propose a quantum-enhanced receiver based on conjugated homodyne detection, which is consisted of two balanced detectors, for discrimination among quadrature-phase-modulated weak coherent states. Our part works as counter every single-shot measurement during the process feedback, could...